NEW DELHI: India's Sania Mirza entered the quarter-finals of the USD 170,000 AIG Japan Open Tennis Tournament with a straight set victory over Japan's Aiko Nakamura on Thursday.

Sania, sedded eighth, set up a clash with top seed Russia's Zvonareva, who beat Shahar Peer of France 6-3, 7-5 to make it to the last eight.

Continuing her fine form in the tournament, Sania thwarted the home challenge with a 6-1, 6-4 win after the match had to be postponed on wednesday due to heavy rains.

"I thought I played a good match. I had a solid start to the match in the first set. In the second set, Aiko picked up her game, but I think I played well when it mattered on the important points," she said after the match.

The 18-year-old from Hydreabad had defeated Vilmarie Castellvi of Puerto Rico in her first round.